Release v0.3.5

What's Changed

• Add climdex indices (https://www.climdex.org/)
• Update plotting methods
• Update type hinting
• Add Python 3.12 test suite by @martinvonk in #27
• Update main to v0.3.5 by @martinvonk in #28

Full Changelog: v0.3.4...v0.3.5